SU1312748A1 - Device for reception of shift-difference bipulse signal - Google Patents

Abstract

The invention relates to telecommunications. The purpose of the invention is to reduce the time taken to synchronize. The device contains the triggers I and 2, the impulse shaper 3, the band-pass filter 4 with the signal shaper, EL-EXCLUSIVE OR 5, and the frequency divider (PM) 6 into two. The goal of a dog is stigmatized by the introduction of a PM 6, generating a recovered clock signal depending on the initial conditions & GO work, and an ELIMINATOR OR 5, generating a recovered information signal. In this case, the restoration of the information signal does not depend on the initial operating conditions of the PM 6. 2 Il. i (L UH (; j. to 4 00

Description

The invention relates to telecommunications and can be used in digital transmission systems as receivers for sub-primary digital streams.

The purpose of the invention is to reduce the time taken to synchronize.

Fig. 1 shows a structural electrical circuit of a device for receiving a relative bi-pulse signal; Fig. 2 shows timing diagrams explaining its principle of operation.

The proposed device includes a first trigger 1, a second trigger 2, a pulse shaper 3 and a band-pass filter 4 with a signal shaper, and also contains an EXCLUSIVE OR 5 element and a frequency divider 6 on the bottom.

The device works as follows.

The input relative bi-pulse signal (Fig. 2a) is fed to the input of the generator of 3 pulses, which converts all transitions from one level to another in this signal into a sequence of pulses. {fig.2b). From the received signal, the band-pass filter 4 with a signal conditioner produces first a sinusoidal signal (Figure 2b), and then generates a pulse signal (Figure 2d). at double the clock frequency. Using the frequency divider 6, the recovered clock signal is generated by two according to the diagram in Figure 2d or according to the diagram in Figure 2i, depending on the initial conditions of its operation. The first trigger 1 positive edges of the recovered clock signal gates the input relative bi-pulse signal, as a result of which, at its output, a signal is formed according to the diagram in Figure 2e, or according to the diagram in Figure 2k. At the output of the second trigger 2, a signal delayed by one clock interval appears — the diagrams of Fig. 2g or 2l, respectively. On you

the element EXCLUSIVE OR 5, whose inputs are affected by the output signals of the first and second triggers (| and 2), produces a reconstructed information signal according to the diagram of FIG. 2h or according to the diagram of FIG. 2m, i.e. recovery of the information signal is independent

from the initial operating conditions of the divider 6 frequency by two. At the same time, the connection time is determined by the time for establishing oscillations in the bandpass filter 4 with the signal conditioner and does not depend on the statistical characteristics of the information component of the input relative bi-pulse signal, which allows, in comparison with the known device, to reduce information loss when the device or when switching to a backup device on redundant systems.

formula of invention

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A device for receiving a bi-pulse relative signal containing first and second triggers and serially connected pulse generator and a band-pass filter with a signal generator, wherein the input of the pulse generator is an input of the device, the clock output of which is combined with the clock inputs of the first and second triggers, characterized in that . In order to reduce the time to synchronization, an EXCLUSIVE OR element and a frequency divider by two are introduced, through which the output of the bandpass filter with a signal conditioner is connected to the clock output of the device, whose information output is combined with the output of the EXCLUSIVE OR element, whose inputs are connected to the outputs of the first and second triggers, while the input of the pulse driver is combined with the information input of the first trigger, the output of which is connected to the information input of the second trigger.

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Claims (1)

Claim A device for receiving a relative bi-pulse signal containing the first and second triggers and serially connected pulse shaper and a bandpass filter with a signal shaper, the input of the pulse shaper being the input of the device, the clock output of which is combined with the clock inputs of the first and second triggers, characterized in that,. in order to reduce synchronization time, an EXCLUSIVE OR element and a frequency divider by> two are introduced, through which the output of the bandpass filter with the signal conditioner is connected to the clock output of the device, the information output of which is combined with the output of the EXCLUSIVE OR element, the inputs of which are connected to the outputs of the first and second triggers, while the input of the pulse former is combined with the information input of the first trigger, the output of which is connected to the information input of the second trigger. 13127A8